package com.atguigu.netty.groupchat;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.*;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.codec.string.StringDecoder;
import io.netty.handler.codec.string.StringEncoder;

/**
 * 群聊系统
 * @author: 叶子
 * @date: 2022/02/18 11:19
 **/
public class GroupChatServer {
    private int port;//监听端口
    public GroupChatServer(int port){
        this.port = port;
    }
//    编写一个run方法，处理客户端请求
    public void run() throws InterruptedException {
//        创建两个线程组
        EventLoopGroup bossGroup = new NioEventLoopGroup(1);
        EventLoopGroup workerGroup = new NioEventLoopGroup();//8个NioEventLoop
        try {
            ServerBootstrap bootstrap = new ServerBootstrap();
            bootstrap.group(bossGroup, workerGroup)
                    .channel(NioServerSocketChannel.class)
                    .option(ChannelOption.SO_BACKLOG, 128)
                    .childOption(ChannelOption.SO_KEEPALIVE, true)
                    .childHandler(new ChannelInitializer<SocketChannel>() {
                        @Override
                        protected void initChannel(SocketChannel ch) throws Exception {
//                        获取到pipeline
                            ChannelPipeline pipeline = ch.pipeline();
//                        向pipeline加入解码器
                            pipeline.addLast("decoder", new StringDecoder());
//                        向pipeline加入编码器
                            pipeline.addLast("encoder", new StringEncoder());
//                        加入自己的业务处理handler
                            pipeline.addLast(new GroupChatServerHandler());
                        }
                    });
            System.out.println("netty服务器启动");
            ChannelFuture channelFuture = bootstrap.bind(port).sync();
//        监听关闭
            channelFuture.channel().closeFuture().sync();
        }finally {
            bossGroup.shutdownGracefully();
            workerGroup.shutdownGracefully();
        }
    }
    public static void main(String[] args) throws InterruptedException {
        new GroupChatServer(7000).run();
    }
}